Please perform a behavior-preserving refactor on this legacy module: first confirm all existing tests pass, identify duplicated logic and overly long functions, improve structure and readability without changing public interfaces; rerun tests after each round of changes, then provide a change summary, a risk checklist, and a commit recommendation only if all tests remain green.

A test-validated refactor plan, structured code changes, risk review results, and a commit recommendation gated by passing tests.

Help reorganize this set of utility functions without changing any existing behavior. First check the test status, then regroup by responsibility, extract shared helpers, and remove meaningless naming; if you detect any risk of behavior change, clearly flag it and withhold commit advice. Finally, output review notes and a suggested commit message.

A complete result including test checks, refactor steps, risk flags, review conclusions, and a suggested commit message.

Please run a controlled refactor workflow on the following code: confirm baseline tests pass, apply structure-only improvements without changing functionality, outputs, or edge cases; verify tests after each key step, then summarize the changes, list unresolved issues, and determine whether the code meets the commit gate.

A refactor execution report focused on behavior preservation, test validation, issue tracking, and commit readiness.